AUSCERT External Security Bulletin Redistribution

           ESB-2001.429 -- Foundstone Advisory FS-101501-20-GWSE
          Novell Groupwise arbitrary file retrieval vulnerability
                              17 October 2001


        AusCERT Security Bulletin Summary

Product:                Novell GroupWise 5.5
                        Novell GroupWise 6
Vendor:                 Novell
Operating System:       Windows 2000
Impact:                 Access Privileged Data
Access Required:        Remote

- --------------------------BEGIN INCLUDED TEXT--------------------

FS Advisory ID:         FS-101501-20-GWSE

Release Date:           October 15, 2001

Product:                Novell GroupWise

Vendor:                 Novell (http://www.novell.com)

Vendor Advisory:        See vendor website.

Type:                   Arbitrary file retrieval vulnerability

Severity:               High

Author:                 Mike Shema (mike.shema@foundstone.com)
                        Foundstone, Inc. (http://www.foundstone.com)

Operating Systems:      Windows 2000

Vulnerable versions:    GroupWise 5.5, 6

Foundstone Advisory:
- ---------------------------------------------------------------------


        A vulnerability exists with Novell's GroupWise server which
        allows for the arbitrary viewing of files anywhere on the
        system. This includes files outside of the web root, but on
        the same volume as the web server.


        The Novell GroupWise server has a web-based front-end for
        users to access e-mail and other functions of the server. The
        default login page is accessed by the URL:


        The webacc usually accesses templates from the "/" directory;
        however, the servlet will follow directory path traversal. 
        It is possible to view the full path of the server install by
        passing an invalid argument to the User.html variable:

        which will display the full path of the GroupWise install.

        Arbitrary files can be read by the webacc servlet by passing
        the appropriate file name and appending a null character to
        the string:


        Administrators should note that the Groupwise configuration
        files can be viewed with this exploit. Care should be taken 
        to limit the amount of sensitive data within these files.
Proof of concept

        From a browser, make the following URL request:



        Please contact the vendor for a solution. Customers should
        obtain upgraded software by contacting their customer support
        representative to obtain patches.

        The severity of this vulnerability and vulnerabilities of a 
        similar nature can be significantly reduced by installing the
        GroupWise server (or other application) files on a disk volume
        separate from the windows system root.


        We would also like to thank Novell for their reaction
        to this problem and their co-operation in heightening security
        awareness in the security community.


        The information contained in this advisory is the copyright
        (C) 2001 of Foundstone, Inc. and believed to be accurate at
        the time of printing, but no representation or warranty is
        given, express or implied, as to its accuracy or
        completeness. Neither the author nor the publisher accepts
        any liability whatsoever for any direct, indirect or
        conquential loss or damage arising in any way from any use
        of, or reliance placed on, this information for any purpose.
        This advisory may be redistributed provided that no fee is
        assigned and that the advisory is not modified in any way.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content.  The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security

Internet Email: auscert@auscert.org.au
Facsimile:	(07) 3365 7031
Telephone:	(07) 3365 4417 (International: +61 7 3365 4417)
		AusCERT personnel answer during Queensland business hours
		which are GMT+10:00 (AEST).
		On call after hours for emergencies.

Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key